| 燃煤工业区不同土地利用类型土壤汞含量污染评价 |
| 摘要点击 1791 全文点击 533 投稿时间：2021-09-08 修订日期：2021-11-17 |
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| 中文关键词 燃煤工业区 土壤污染评价 空间变异 汞污染 环境风险 |
| 英文关键词 coal-fired industrial zone soil pollution assessment spatial variation Hg pollution environmental risk |
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| 中文摘要 |
| 为揭示黄土高原燃煤工业区不同土地利用方式下土壤Hg污染特征及空间变异程度，以山西省忻州市西部7县为研究区域，采用地累积指数、潜在生态风险指数、健康风险模型和地理探测器等对该区域不同土地利用类型中的Hg含量进行污染及健康风险评价.结果表明，耕地、草地、林地和居住用地中ω（Hg）均值分别为0.48、0.34、0.58和0.52mg ·kg-1，耕地、草地、林地和居住用地中Hg平均值分别为背景值的16、11.33、19.33和17.33倍，变异系数大小为：居住用地>耕地>草地>林地.地累积指数与潜在生态风险指数评价结果表明，研究区整体受Hg污染生态风险程度较为严重，局部区域存在极强污染.健康风险评价结果表明研究区Hg对儿童和成人均不存在非致癌健康风险.因子探测结果表明耕地Hg的空间变异性主要受工农业生产影响，草地Hg主要受土壤有机质和pH值影响，林地Hg主要受土壤盐分的影响，居住用地Hg主要受土壤盐分和有机质的影响.Hg含量空间分布格局总体上表现为中部向南北两侧递增趋势，污染严重区域主要受煤炭开采及工业生产等人类扰动因素影响. |
| 英文摘要 |
| The geo-accumulation index, potential ecological risk index, health risk model, and geographical detector were used to evaluate the soil mercury (Hg) concentrations and assess the health risks for various land use types to reveal the characteristics and spatial variability of soil Hg pollution under different land uses in the coal-fired industrial area of the Loess Plateau. The study area included seven counties in the western part of Xinzhou City, Shanxi province. The results showed that the average ω(Hg) in the agricultural land, grass land, wood land, and residential land were 0.48, 0.34, 0.58, and 0.52 mg·kg-1, respectively, which were 16.00, 11.33, 19.33, and 17.33 times higher than the background value, respectively. The variation coefficients were ranked as residential land>agricultural land>grass land>wood land. The evaluation results of the geo-accumulation index and potential ecological risk index indicated a high ecological risk of Hg pollution in the entire study area with extreme pollution points in certain aeras. The health risk assessment results indicated no non-carcinogenic health risks for children and adults in the study area from Hg. Additionally, the geographical detection results revealed that the spatial variability in Hg was mainly impacted by industrial and agricultural activities in agricultural land, by soil organic matter and pH value in grass land, by soil salinity in wood land, and by soil salinity and organic matter in residential land. The spatial distribution pattern of Hg concentrations peaked in both the northern and southern edges, with a decreasing trend towards the middle and the majorly polluted areas being caused by human activities such as coal mining and industrial production. |
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